Nabumetone is a non-steroidal anti-inflammatory drug of the arylalkanoic acid family (which includes diclofenac). Marketed under the brand name Relafen, it has been shown to have a slightly lower risk of gastrointestinal side effects than most other non-selective NSAID's.
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Nabumetone /na·bu·me·tone/ a nonsteroidal antiinflammatory drug used in the treatment of osteoarthritis and rheumatoid arthritis. [more]Nabumetone - Community and Resources